I see. Those indeed are not possible on Wayland, at least not the way that was on Xorg. KDE has a built-in tool like xprop but I don't know if it can be used on its own other than running it via KDE settings (There is Detect window properties option under Window rules.)

From my own experience, using global keys was quite a hassle. I have found some workarounds to some but it's still an open issue for me. Wayland has changed how a lot things work and I believe there will be solutions or at least workarounds to all Xorg tools in time, maybe with something like Flatseal but for Wayland but main issue which is security remains, so I don't know how things will go.